A carbon dioxide gas sensor based on solid electrolyte for air quality control

被引：55
|
作者：
Kaneyasu, K
Otsuka, K
Setoguchi, Y
Sonoda, S
Nakahara, T
Aso, I
Nakagaichi, N
机构：
[1] Figaro Engn, Osaka 5628505, Japan
[2] Yamatake Honeywell, Isehara Factory, Isehara, Kanagawa 2591195, Japan
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2000年 / 66卷 / 1-3期
关键词：
gas sensor; solid electrolyte; carbon dioxide; air quality control;
D O I：
10.1016/S0925-4005(99)00411-6
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A practical CO2 gas sensor for air quality control is developed by using a combination of a Na3Zr2Si2PO12 (NASICON) as a solid electrolyte and Li2CO3 as a carbonate phase. The sensor's electromotive force (emf) shows a linear relationship with the logarithm of CO2 concentration. Zeolite is chosen as a filter material in order to minimize the effect of interfering gases on the sensor's emf and shows very little sensor response deterioration to CO2. Under continuous energizing, both the emf and a change in the emf (defined as Delta emf) are stable over a period of 2 years. However, after the sensor is exposed to a high humidity atmosphere in an unpowered state, the emf decreases, but Delta emf stays constant. A new data selection method for renewing the standard of the emf is investigated in order to monitor CO2 concentration using Delta emf. The output of the CO2 monitor corresponds to a conventional non-dispersive infrared (NDIR) analyzer. (C) 2000 Elsevier Science S.A. All rights reserved.
引用
收藏
页码：56 / 58
页数：3
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